I will surprise you, but the package key can be activated, even if this package has already been previously activated on the account

You are wrong about that, as long as there's part of a bundle that you do not own you can redeem the key. Neither SG nor Steam have an issue with that. It is however, up to the person making the giveaway to either allow those entries or not allow them; They are the ones giving the game away - that is why we ask.
There's no need to repeat your incorrect message 3 times.